From the Document: "S. 1941 would require the Office of Management and Budget (OMB) to describe how core-based statistical area (CBSA) delineations--geographic specifications established for the country's largest population centers--are used to determine eligibility for and distribution of federal services and benefits. Under current law, OMB establishes standards for determining CBSA delineations, which are to be used solely for descriptive and statistical purposes. The bill would require OMB to report on the scientific basis for changing any CBSA delineation. Federal agencies use CBSAs for nonstatistical purposes, such as determining allocations for federal funding. S. 1941 would prohibit agencies from automatically adopting any changes to CBSA delineations for nonstatistical purposes unless those changes were adopted through a public rulemaking process. Finally, the bill would require the Government Accountability Office (GAO) to report on the accuracy and usefulness of published CBSA information."
Congressional Budget Office: https://www.cbo.gov/